Variable-speed and reversing mechanism.



PATENTEE JULY 24, 1906.

G. STEPHAN.l VARIABLE SPEED AND EEVEESING MEGHANISM.

A PPLIOAT'ION EILED MAE.16.1906.

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VARIABLE-SPEED AND REVERSING IVIECHANISM.

Specification of Letters Patent.

Patented July 24, 1906.

Application led March 16, 1906. Serial No. 306,373.

To all whom t may concern:

Be it known that I, Gaone STEPHAN, a subject of the German Emperor,residing at Mertzwiller, Alsace, Germany, have invented certain new anduseful Improvements in Variable-Speed and Reversing Mechanism; and I dohereby declare the following to be a full, clear, and exact descriptionof the invention, such as will enable others skilled in the art to whichit appertains to make and use the same, reference being had to theaccompanying drawings, and to letters of reference marked thereon, whichform a part of this specification.

My invention relates to variable-speed and reversing mechanism suitableto be used in connection with machines that require but a small drivingpower; and it consists of the construction of the coperating partshereinafter described and claimed.

Referring to the drawings, in which like parts are similarly designated,Figure l is an elevation, partly in section, of the mechanism. Fig. 2 isa section on line A B of Fig. 1.

In the mechanism, c is the main shaft, from which the power for drivinga machinetool, such as a small lathe or other device, is to be driven,and this shaft may or may not be a line-shaft, depending upon therelative arrangement and location of the machine-tools to the shaftingin the shop. Such being the case it will be sufficient to say that theshaft c is driven.

Keyed on shaft c is a cone b and a gearwheel c. The gear-wheel c mesheswith an idle gear-wheel or pinion d, which in turn meshes with anddrives a gear-wheel e, said gear-wheel e being shown as of smallerdiameter than the gear-wheel c, so that the direction of rotation of thegear-'wheel c will be the same as the shaft a and gear-wheel c, but thespeed will be greater. n

T hegear-wheel e is keyed to shaft f parallel with shaft a. On saidshaft f is mounted a loose cone g, opposite in conicityto cone and alsoa loose internally-toothed member h, which may be a belt-pulley, asshown, or a gear-wheel at its periphery, this being the member fromwhich power is taken to drive the machine-tool or other device. Fixed onthe shaft f and within the internally-toothed member h is a gear-wheeli, and between this gear-wheel i and member h and gearing with both ofthem is a planet-wheel lc, mounted on stub-shaft Z, fixed in one end ofcone g and here shown as the larger end. The cones are belted togetherby a belt m, capable of being shifted along them by any suitablebelt-shifting device. (Not shown.)

The operation is as follows: When the belt m is in such a position thatcone g and shaftf have the same speed of rotation-fi. e., angularspeed-the member h will move in unison therewith. When the speed of thecone g lags behind that of shaft f, the direction of rotation of themember h will be reversed, and when the speed of cone g is greater thanthat of shaft f t e member h will be rotated at a greater speed thanthat of shaft f and in the same direction.

It is of course obvious that the relative diameter of the gear-wheel cto e can be varied to suit the circumstances of use as well as theconicity of the cones, and that in place of a single planet-wheel kseveral such may be used symmetrically arranged around the center of thecone g, thereby giving greater strength and more uniformly distributedpower, also that stepped pulleys the equivalents of the cones may beused in their stead.

Having thus described my invention, what I claim as new therein, anddesire to secure by Letters Patent, is-

l. In a mechanism such as described, a driving-shaft, a gear-wheel andcone fixed thereon, a driven shaft parallel to the first shaft, agear-wheel fixed thereto at one end and an idle pinion between the twogearwheels, a cone loose on the driven shaft of opposite conicity to theone on the drivingshaft, an internally-toothed member loose on thedriven shaft, a gear-wheel within the member fixed on the driven shaft,a planetwheel on the second cone meshing with the internally-toothedmember and gear-wheel therein, and a shiftable belt connecting the twocones.

2. In a mechanism such as described, a driving-shaft and a cone fixedthereon, a shaft driven from the driving-shaft, a cone loose thereon, abelt belting the two cones together, a gear-wheel fixed on the drivenshaft, a member loose on the driven shaft and planet-wheel cooperatingwith said member and gear-wheel to impart differential motion to themember.

3. In a mechanism such as described, a driving-shaft, a cone fixedthereon, a shaft driven from the driving-shaft, a cone loose thereon, ashiftable' belt driving the loose cone from the fixed cone to vary thespeed of the former cone, amember loose on the driven IOO IIO

shaft, and differential mechanism colmratingl tween the two gear-wheels,a cone and an in-l with the cone, driven shaft and member toternally-toothed member `both loose on the differentially drive saidmember.

4. In a mechanism such as described, a driven shaft, a cone loosethereon, an internally-toothed member loose on said shaft, 'a gear-wheelin said member fixed on the shaft, planet-gear carried by the cone andbetween the gear-wheel and member, and means to drive the cone atdifferent speeds independent of the speed of the shaft.

5. In a mechanism such as described, a driving-shaft, a gear-wheel and acone fast thereon, a driven shaft, a gear-wheel 'fixed lthereondiffering in diameter from the gearwheel on the driving-shaftan idlepinion bedriven shaft, a gear-wheel 'fixed on the driven` shaft withinthe internally-toothed member, a planet-wheel mounted at the endv of thecone and engaging both the member and gear-wheel therein, and ashiftable belt to drive the loose cone from the fixed cone.

vIn testimony that I claim the foregoing as my invention I have signedmy name in presence of two subscribing witnesses.

lGEORG sTErHAN. Witnesses D. JEAN WEIMEL, JULIUs GRUBER

